Male and Female at birth: Gender may be fluid but sex is not. What percent of the population have oddball X and Y chromosomes?

 This report on 170,000 people shows seventeen unusual variations on the standard XX (female) and XY (male) but the exceptions are only 6 people out of every ten thousand.    Gender may be fluid  but sex is not.

The first column in the chart is what I'm addressing.   141,813 out of 141,916 women were XX and 29,320 out of 29,336 men were XY.   Every cell in female or male body has the same XX or XY markers.  All talk of gender fluidity is about something different.

Bonus thought:  Sex differentiation in other species including plants and insects may involve XX/XY but may involve a different pair of genes with the male having the matched pair the the female having the unmatched pair.  And other possiblities too.